Default Frustrated! !!

Hi everyone I have a at&t note 2 and I have been trying to root it an loads roms. I've use kingo root clock work mod premium, rom installers, root checkers. Attempted to root with multiple different applications and many others even the paid root s.w. and still nothing. I've been all over the forms here with all
the suggestions and different s.w. to use. I'm pretty good with computers but can see to root this thing. Would anyone be willing to help me???
Thx Shawna